Weather Glossary



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Deformation Zone The change in shape of a fluid mass by variations in wind, specifically by stretching ...
Derecho a widespread and usually fast-moving windstorm associated with convection. Derechos include any family of downburst ...
Dew Point A measure of atmospheric moisture. It is the temperature to which air must be cooled ...
Difluence A pattern of wind flow in which air moves outward (in a "fan-out" pattern) away ...
Directional Shear The component of wind shear which is due to a change in wind direction with ...
Divergence The expansion or spreading out of a vector field; usually said of horizontal winds. It ...
Downburst A strong downdraft current of air from a cumulonimbus cloud, often associated with intense thunderstorms. ...
Downdraft A small-scale column of air that rapidly sinks toward the ground, usually accompanied by precipitation ...
Dry Adiabat A line of constant potential temperature on a thermodynamic chart. ...
Dry Line A boundary separating moist and dry air masses, and an important factor in severe weather ...
Dynamic Lifting The forced uplifting of air from various atmospheric processes, such as weather fronts, and cyclones. ...
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Weather can be active anytime when you make your visit to Canada. With each season offering its own unique conditions to observe. Booking coach or business class flights it is always a great time to visit Canada and its vast display of weather.